| Siran to Opwijk | 1,824.80 mi (2,936.73 km) |
| Siran to Ostend | 1,881.91 mi (3,028.65 km) |
| Siran to Oud-Heverlee | 1,802.41 mi (2,900.70 km) |
| Siran to Oud-Turnhout | 1,795.43 mi (2,889.47 km) |
| Siran to Oudenaarde | 1,848.43 mi (2,974.77 km) |
| Siran to Oudenburg | 1,877.98 mi (3,022.32 km) |
| Siran to Oupeye | 1,758.88 mi (2,830.64 km) |
| Siran to Overijse | 1,807.51 mi (2,908.90 km) |
| Siran to Overpelt | 1,775.67 mi (2,857.66 km) |
| Siran to Paal | 1,783.51 mi (2,870.28 km) |
| Siran to Peer | 1,772.90 mi (2,853.20 km) |
| Siran to Pepinster | 1,749.51 mi (2,815.56 km) |
| Siran to Peruwelz | 1,845.47 mi (2,969.99 km) |
| Siran to Perwez | 1,793.41 mi (2,886.21 km) |
| Siran to Philippeville | 1,799.94 mi (2,896.73 km) |
